JPS6363382B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermal recording device having a rotatable upper lid, and in particular to an improved mounting structure for a thermal head to simplify position adjustment of the thermal head and reduce manufacturing costs. This article relates to an advanced heat-sensitive recording device.

Conventionally, a thermal recording device includes a top cover 2 whose one end is rotatably attached to a support shaft 1, for example as shown in FIG.
There is a device in which a head mount 4b to which a thermal head 4a is fixed is attached via a holder, and recording is performed by pressing the thermal head 4a against a platen roller 5 using the elastic force of the support member 3. In such a device, the heat-sensitive head 4a can be heated simply by rotating the top cover 2.
Since it can be pulled out from inside the device, it has the advantage of being relatively easy to repair or replace.

However, in the conventional device described above, the head mount 4b is attached to the support member 3 with screws or the like, and the support member 3 is further screwed to the upper lid 2, so there is no requirement to specify the position of the heat-sensitive head 4a. becomes very large. Therefore, during assembly and maintenance, it takes a lot of effort and time to position the thermal head 4a with respect to the platen roller 5. Furthermore, high precision is required in the installation positions of the support member 3 and the screw holes, resulting in an increase in manufacturing costs.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to reduce the positioning requirements of the thermal head, facilitate position adjustment work, reduce manufacturing costs, and reduce the maintenance and maintenance costs of the thermal head. It is an object of the present invention to provide a heat-sensitive recording device which is easy to replace recording paper and has excellent handling properties.

In the present invention, the other end of the head mount having a heat-sensitive head attached to one end thereof is rotatably attached to the support shaft of the upper lid body, and the head mount and the upper lid body are connected together. The purpose is to achieve the above object by providing a mechanism for removably integrating the two.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 2 to 4. 2 is a side sectional view showing a portion related to the present invention of the thermal recording device in the same embodiment, FIG. 3 is a sectional view taken along the line AA in FIG. 2, and FIG. -B is a cross-sectional view taken in the direction of arrows. In addition, in FIGS. 3 and 4, the platen roller 5,
The guide member 6, roll-shaped recording paper 7, etc. are omitted.

The upper lid body 10 has support shafts 1 on both sides of the base end of the plate-like body.
1 and 11 are integrally formed, and this support shaft 1
By pivoting the outward protrusions 12a, 12a of the support shafts 12, 12, which are press-fitted into the support shafts 1, 11, to the side plate 8 of the device, they can be rotated in the direction of the arrow C--C. Furthermore, engaging portions 13 are formed on both sides of the top end side of the upper lid body 10 to protrude downward. These engaging portions 13, 13 lock the upper lid body 10 by engaging with locking pins of the head mount 20, which will be described later.
This is for structurally integrating the head mount 20 and the head mount 20.

On the other hand, the head mount 20 consists of a pair of arm parts 21, 21 integrally formed on the proximal end side of a plate-shaped body, and an electric circuit part 30 is mounted on the lower surface of these arm parts 21, 21. A heat-sensitive head 40 is attached to the bottom surface of each head. In addition, each arm portion 21, 2
U-shaped notch recesses 22, 22 are provided on the lower surface of the tip of 1.
is formed. These cutout recesses 22, 22
The inward protrusions 12b, 12b of the support shafts 12, 12 provided on the upper lid body 10 engage with each other. As a result, the head mount 20 is rotatably supported in the direction of arrow C--C independently of the upper lid body 10 about the support shafts 12, 12. In addition, the notch recess 22,
22 causes the thermal head 40 to abut against the platen roller 5. The contact pressure of the heat-sensitive head 40 against the platen roller 5 is adjusted to a constant pressure by the elastic restoring force of a leaf spring 50, one end of which is fixed to the back surface of the top cover 10. In addition, in FIG. 3, ◯ indicates a row of heat generating elements arranged in a straight line corresponding to the position of contact with the platen roller 5. Further, a pair of projections 23, 23 are provided on both sides of the upper surface of the plate-like body of the head mount 20, and engagement pins 24, 2 that protrude outward are provided on these projections 23, 23.
4 is provided. These engagement pins 24, 24
The above-described structure of the upper lid body 10 and the head mount 20 is realized by engaging with the locking holes 14, 14 provided in the engaging portions 13, 13 of the upper lid body 10. It is. The engaging state of the engaging pins 24, 24 and the locking holes 14, 14 is determined by dividing the engaging parts 13, 13 into upper and lower parts from the middle part, and hinged the lower piece 1a to the upper and lower pieces 13b. , can be attached and detached by rotating the lower piece 13a. The state shown by the two-dot chain line ○○ in Figure 2 is the lower piece 13.
This is the state in which part a is separated from the upper piece 13b.

In addition, the above-mentioned upper lid body 10 and head mount 20 operate in a state where the thermal head 40 is in contact with the platen roller 5, that is, in a normal operating state.
It is configured to slope downward toward the tip with respect to the horizontal plane.

Now, when assembling the device having the above configuration, first, for example, the support shafts 12 and 1 of the upper lid body 10 are assembled.
2 is pivotally supported on the device side plate 8 and the upper lid body 10 is attached, and then with this upper lid body 10 opened,
The notch recesses 22, 22 of the head mount 20, to which the electric circuit part 30 has been screwed in advance and the heat-sensitive head 40 has been attached with the mounting tool 41, are inserted into the support shafts 12, 1.
It is engaged with the inwardly protruding parts 12b, 12b of No.2. In this state, the thermal head 40 is aligned in advance with respect to the head mount 20 in a manner corresponding to the platen roller 5 using a jig, and is thus assembled into a unit. Next, the engaging parts 13, 13 of the upper lid body 10
are engaged with the engagement pins 24, 24 of the head mount 20 to integrate the upper lid body 10 and the head mount 20, and the assembly is completed.

Because of this type of device, when assembling or maintaining the device, the unit of the head mount 20 is directly attached to the support shafts 12, 12. There is no need to align the thermal head 40 with respect to the platen roller 5, just by accurately adjusting the mounting position. In other words, the thermal head 40 can be aligned by adjusting only one point. As a result, alignment requirements are reduced compared to the prior art, making alignment during assembly or maintenance significantly easier, thereby improving workability and, therefore, productivity. Moreover, with this device, the head mount 20 is removably integrated with the upper lid 10, so that the head mount 20 can be attached to the upper lid 10 in response to the rotational movement of the upper lid 10.
When maintaining the thermal head or replacing and replenishing the recording paper stored in the device, the thermal head can be exposed outside the device by simply rotating the top cover 10. As a result, maintenance and inspection of the thermal head, replacement and replenishment of recording paper, etc. can be performed easily and efficiently. In addition, in this case, the support shafts 12 and 1 of the head mount 20 are
Since the shaft attachment portions for the support shafts 2 and 2 are notched recesses 22 and 22, attachment and detachment to and from the support shafts 12 and 12 is extremely easy. Therefore, maintenance such as inspection and repair of the electric circuit section 30 and replacement of the thermal head 40 can be carried out very easily without having to attach or detach a large number of screws.

Furthermore, in the apparatus of this embodiment, the upper lid 10 and the head mount 20 are tilted. Therefore, the heat generated by the heat sensitive head 40 is absorbed by the head mount 20.
The heat dissipation holes ( (not shown), etc., to the outside of the device. Therefore, the temperature near the thermal head 40 is always suppressed to a substantially constant value or less, and as a result, it is possible to substantially eliminate problems such as deterioration of the characteristics of the electric circuit section 30 and erroneous coloring of the thermal recording paper, thereby increasing reliability. It becomes possible.

In other words, with the device of this embodiment, it is possible to easily align the thermal head 40 during assembly or maintenance, and to replace and replenish other parts and recording paper, resulting in excellent workability and reduced manufacturing and maintenance costs. It becomes possible to provide an inexpensive device. Furthermore, since the structure is such that the heat generated by the heat-sensitive head 40 can be smoothly released, there is an advantage that a highly reliable device with excellent operational stability and few failures can be provided.

Note that the present invention is not limited to the above embodiments. For example, a document supply guide or the like may be provided on the upper surface of the upper lid 10, thereby allowing the upper surface of the upper lid 10 to function as a document supply table to a facsimile transmitter (not shown). Also, head mount 2
The shape of the notch recesses 22, 22 of 0 is not only U-shaped but also V-shaped.
It may be a letter shape or a modified version of the V-shape, such as a U-shape. Further, the mechanism for integrating the upper lid body 10 and the head mount 20 is such that the engagement pin 24 is a screw, and this screw is screwed into the protrusion 23 through the locking hole 14 provided in the engagement member 13. You can do it like this. In this way, the engaging member 13 is
There is no need to divide it into 3a and 13b, which simplifies the structure. Further, as shown in FIGS. 5a to 5c, a protrusion 20a is provided at the tip of the head mount 20, and a notch is formed in the center of the rib 10a of the upper cover body 10, and the protrusion 20a is accommodated in this notch. The upper lid body 10 and the head mount 20 may be integrated by closing the portion with the locking piece 10b. In this case, integration and separation are easily possible by attaching and detaching the screw 10c. Further, one end of the locking piece 10b may be rotatably attached to the rib 10a, and the other end may be screwed to integrate and separate the pieces. In this way, not only the attachment/detachment operation becomes easier, but also the problem of the locking piece 10b being lost when separated will not occur. Further, the top cover 10 and the head mount 20 may be integrated using a permanent magnet or an electromagnet, and the installation location may be at the tip of the top cover 10, etc., outside of the side position of the top cover 10. May be set. In addition, the structure of the support shaft and its bearing structure, the spring mechanism for adjusting the pressing force of the thermal head 40 against the platen roller 5, the shape and structure of the top cover body and head mount, etc., may be changed within the scope of the present invention. It can be implemented with various modifications.

As described in detail above, according to the present invention, the other end of the head mount having the heat-sensitive head attached to one end is rotatably attached to the support shaft of the upper lid body, independently of the upper lid body, In addition, by removably integrating the head mount and the upper lid body and providing a mechanism that allows the rotational movement of the head mount to follow the rotational movement of the upper lid body, the positioning requirements for the thermal head can be reduced and the position can be adjusted. This makes it possible to reduce manufacturing costs by making the work easier, and also makes maintenance of the thermal head and replacing the recording paper easier, thereby providing a thermal recording device that is easy to handle.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of main parts of a conventional thermal recording device, FIGS. The side sectional view, FIGS. 3 and 4 are sectional views taken along the lines AA and BB in FIG. 2, respectively, and FIGS. be. DESCRIPTION OF SYMBOLS 10... Upper lid body, 11... Support shaft part, 12... Support shaft, 13... Engagement part, 14... Locking hole, 20...
...Head mount, 21...Arm portion, 22...Notch recess, 23...Protrusion, 24...Engagement pin, 30...
...Electric circuit section, 40... Heat-sensitive head, 50... Leaf spring.

Claims (1)

[Scope of Claims] 1. In a thermal recording device equipped with a rotatable top lid, the other end of a head mount having a heat-sensitive head attached to one end is attached to a support shaft of the top lid, independent of the top lid. The head mount is rotatably attached to the shaft, and the head mount and the upper lid body are removably integrated, and a mechanism is provided for causing the rotational movement of the head mount to follow the rotational movement of the upper lid body. Heat-sensitive recording device. 2. The thermal recording device according to claim 1, wherein the upper lid body and the head mount are provided at an angle with respect to a horizontal plane. 3. The heat-sensitive recording device according to claim 1, wherein the shaft attachment portion of the head mount that is pivotally attached to the support shaft of the upper lid body is configured in a concave shape, thereby making the head mount detachable from the support shaft. Device.